Excerpts from Christophe Leroy's message of June 11, 2020 10:26 pm:

Le 11/06/2020 à 14:11, Nicholas Piggin a écrit :

quoted

blrl is not recommended to use as an indirect function call, as it may
corrupt the link stack predictor.

This is not a performance critical path but this should be fixed for
consistency.

There's exactly the same in entry_32.S
Should it be changed there too ... for consistency :) ?

ppc32 also uses blrl for calling syscall handler, should it be changed 
as well ?

Yes I would say so. I don't know much about 32-bit implementations but
MPC7450 at least has a link stack predictor.

Thanks,
Nick